From: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Date: Sat, 9 May 2020 00:00:13 +0200
Subject: [PATCH] blk-throttle: remove tg_drain_bios
References: bsc#1175995,jsc#SLE-15608
Git-commit: 32e3374304c7c317c05a61f3ddc315dbd46424f2
Patch-mainline: v5.8-rc1

After blk_throtl_drain is removed, there is no caller of tg_drain_bios,
so remove it as well.

Signed-off-by: Guoqing Jiang <guoqing.jiang@cloud.ionos.com>
Signed-off-by: Jens Axboe <axboe@kernel.dk>
Signed-off-by: Hannes Reinecke <hare@suse.de>
---
 block/blk-throttle.c | 22 ----------------------
 1 file changed, 22 deletions(-)

diff --git a/block/blk-throttle.c b/block/blk-throttle.c
index 0b2ce7fb77a7..209fdd8939fb 100644
--- a/block/blk-throttle.c
+++ b/block/blk-throttle.c
@@ -2358,28 +2358,6 @@ void blk_throtl_bio_endio(struct bio *bio)
 }
 #endif
 
-/*
- * Dispatch all bios from all children tg's queued on @parent_sq.  On
- * return, @parent_sq is guaranteed to not have any active children tg's
- * and all bios from previously active tg's are on @parent_sq->bio_lists[].
- */
-static void tg_drain_bios(struct throtl_service_queue *parent_sq)
-{
-	struct throtl_grp *tg;
-
-	while ((tg = throtl_rb_first(parent_sq))) {
-		struct throtl_service_queue *sq = &tg->service_queue;
-		struct bio *bio;
-
-		throtl_dequeue_tg(tg);
-
-		while ((bio = throtl_peek_queued(&sq->queued[READ])))
-			tg_dispatch_one_bio(tg, bio_data_dir(bio));
-		while ((bio = throtl_peek_queued(&sq->queued[WRITE])))
-			tg_dispatch_one_bio(tg, bio_data_dir(bio));
-	}
-}
-
 int blk_throtl_init(struct request_queue *q)
 {
 	struct throtl_data *td;
-- 
2.16.4